Dimitry Andric <d...@freebsd.org> wrote: > > On 21 Jun 2020, at 14:36, Chris Nehren <cneh...@pobox.com> wrote:
>> On Sunday, June 21, 2020 8:11:15 AM EDT Michael Grimm wrote: >>> Hi, >>> >>> I am following FreeBSD 12.1-STABLE. >>> >>> Clang has been upgraded to version 10.0.0 on May, 1st, and ever since that >>> time, I do observe a dramatic increase in compilation times of building >>> world, kernel and ports. I didn't benchmark the exact times, but >>> compilation times are at least increased by a factor of 1.5. Nothing has >>> changed of the last month besides upgrading 12.1-Stable every other week. >>> >>> Has anyone else been bitten by this? >> >> I don't have measurements to corroborate this, but here's a mailing list >> thread where folks are talking about it (split across two URLs, the OP posted >> in April and then there was a followup in May): >> >> http://lists.llvm.org/pipermail/llvm-dev/2020-April/140938.html >> https://lists.llvm.org/pipermail/llvm-dev/2020-May/141482.html >> >> So there definitely seems to be *something* going on, and you are indeed not >> crazy. :) > > Indeed, there is some upstream discussion going on about this issue. > There are some scenarios where people see non-negligible performance > loss, but apparently not everybody suffers from it. If you build the > whole ports collection, it is rather likely you may bump into it. I have > personally not seen much performance difference in building world, > kernel etc. > > One of the upstream problems is that there is not really any > authoritative performance regression log being built up, so it is hard > to see where such regressions were introduced. Somebody then has to > spend a lot of time tracking down each and every regression, and then > attempt to untangle it from the dozens of commits made around the same > time. :) > > In any case, there is at least some attention on it now, so hopefully > this will improve again. I don't think such fixes will be trivial > though, so it is not likely they will land in 10.0.1. > > -Dimitry ok, so others see some performance loss as well. In the meantime I activated META_MODE and hope, that will speed-up my weekly compilations. Thanks to all who answered, and regards, Michael _______________________________________________ freebsd-stable@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "freebsd-stable-unsubscr...@freebsd.org"
